ROCHESTER — A 49-year-old man was flown to Maine Medical Center Thursday after sustaining serious injuries during an assault at the Rochester Residence Inn on Milton Road.

Police say that the man, who was a resident at the inn, suffered serious head injuries in the assault around 7:59 p.m. Thursday.

Clifford J. Gagnon, 24, who last known address is listed by police as being 159 Milton Road in East Rochester, was arrested after a police investigation in the matter. He was charged with second-degree assault, a Class B felony.

The victim was transported to Skyhaven Airport. From there, a helicopter flew him to Maine Medical Center.

Police say Gagnon and the victim are known to each other, and the incident does not appear to have been a random act.

Gagnon is being held at the Strafford County House of Corrections on $25,000 cash bail. His arraignment is scheduled for 11 a.m. Tuesday at the Rochester Circuit Court.